Features: Small size, lightweight and portable, comfortable to hold. Universal port, supports SC, FC, ST three common optical fiber interfaces. Design with LED light, convenient for line inspection and construction in dark environment. High-tech chip, good stability, accurate test, high-sensitivity detector, accepting the light source to measure the value in seconds. 10 wavelengths and smart memory: Short press the key to switch between 10 test wavelengths to meet various test requirements. The last test wavelength is automatically saved when shutting down. Package Includes: 1x Optical Power Meter 1x SC/FC Adapter 2x AA Batteries 1x Manual Specifications: Material: ABS Size: Approx. 180x89x42 mm/7.09x3.50x1.65 in Wavelength range: 800~1700nm Probe type: InGaas Display resolution: linear display: 0.1%, logarithmic display: 0.01dBm Standard wavelength: 850/980/1270/1300/1310/1490/1550/1577/1625/1650nm Automatic shutdown time: 10 minutes note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.